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IMPROVEMENT IN THE MANUFACTURE OF GUN-GOTTOE- dip 'fizlgthnlr referrer it in flgest infirm natal zmh making part of the'smme.

TO ALL WHOM IT MAY CONCERN:

Be it known that I, TALIAFERRO P. SHAFFNER, of Louisville, in the county of J efl'crson, and State of Ken-- tucky, have made a new and useful Improved Process for making NitroCotton and other Nitro-Fibre, commonly called Gun-Cotton; and I do hereby declare the following to be a full, clear, and exact description of the nature and operation of the same, suificient to enable one skilled in the art to which it is allied to make use of the same.

The improvement consists in the treatment of the cotton, or other fibre, with the acids and with the cleansing waterunder pressure. The gain is in the time and the completeness of the operation; The object being to saturate the fibre with'the required acids, the more speedily the operation can be performed, the better. The usual course has been to allow thefibre to soak up the acid, and become saturated by capillary attraction. This process is tedious, and my invention'consists in bringing a pressure to bear upon the fibre and the liquid in which it is immersed, so as to saturate the fibre more quickly and completely, and also to cleanse it speedily and thoroughly, .by washing it in water, for the purpose of expelling the remaining liquid af-ter absorption has taken place. Considerable damage frequently occurs to the fibre by the delay in the expulsion of the remaining liquid from the mass of fibre after the absorption is complete, and my invention consists in performing the operations of saturation and washing under pressure, so as .to make them speedy and effective, compelling the fluids to permeate the fibre thoroughly. I

Haring described my invention, what I claim therein as new, anddesire to secure by Letters Patent, is The process of making nitro-cotton (commonly called gun-cotton) or other nitro-fibre, under pressure;

TAL. P. SHAFFNER.

Witnesses:

ALEXR A. C. KLAucKn, EDWARD H. KNIGHT. 

